Hi, I've a problem with my board, I've created a board like this: http://pic18fusb.online.fr/wiki/uploads/Minimal-for-USB-Bootload.gif with the only difference I've added an ICD port for programming en debugging, and the PIC is changed to an 18F2550. I try to get the Microchip bootloader firmware to run, like described on this page: http://pic18fusb.online.fr/wiki/wikka.php?wakka=UsbBootload The problem is that I get an error from windows: "USB Device Not Recognized", and when I check for VID and PID in Device Manager it says VID_0000&PID_0000. I think I've configured the configuration bytes wrong like the person on the Microchip forum: http://forum.microchip.com/tm.asp?m=125094, but I dont get it working. I've tried several possibilities, but whit no success. I think this are the configuration bytes which cause the error, but I don't know which is wrong: Full-Speed USB Clock Source Selection: Clock src from 96MHz PLL/2 CPU System Clock Postscaler: [OSC1/0SC2 Src: /1][96MHz PLL Src: /2] 96MHz PLL Prescaler: Divide by S (20MHz input] Oscillator: HS: HS+PLL, USB-HS USB Voltage Regulator: Enabled Can anyone help me with these configuration bytes, or suggest it's something else which causes this error? Paul -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist